vcd (version 0.1-3.5)

VisualAcuity: Visual Acuity in Left and Right Eyes

Description

Data from Kendall & Stuart (1961) on unaided vision among 3,242 men and 7,477 women, all aged 30-39 and employed in the U.K. Royal Ordnance factories 1943-1946.

Usage

data(VisualAcuity)

source

Michael Friendly (2000), Visualizing Categorical Data: http://hotspur.psych.yorku.ca/ftp/sas/vcd/catdata/vision.sas

References

M. G. Kendall & A. Stuart (1961), The Advanced Theory of Statistics, Vol. 2. Griffin, London.

M. Friendly (2000), Visualizing Categorical Data. SAS Institute, Cary, NC.

Examples

data(VisualAcuity)
ftable(xtabs(Freq ~ gender + left + right, data = VisualAcuity))